Brita 42401 replacement filter cartridges for Brita’s On Tap faucet-mounted water filtration systems will allow you to continue benefiting from the great taste of healthier drinking water. The Brita faucet replacement filter and Brita faucet filter system have been independently tested and certified by NSF International for their ability to remove the microbes cryptosporidium and giardia, as well as remove sediment and 99 percent of lead. Brita’s On Tap filters should be replaced every 100 gallons. This single white replacement cartridge is one of our smart buys in healthy home products at Today’s Concept. Sign up for our special offers